> ## Documentation Index
> Fetch the complete documentation index at: https://docs.athenahq.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Get Pillar Document

> Fetches a pillar's synthesized markdown document. Returns `document: null` when the pillar exists but has no synthesized document yet (this is a 200, not a 404). Also available as the MCP tool `get_pillar_document`.



## OpenAPI

````yaml /api-reference/openapi.json get /api/v1/knowledge-base/pillars/{pillar_id}/document
openapi: 3.1.0
info:
  title: AthenaHQ API
  description: >-
    AthenaHQ API provides programmatic access to manage your websites and
    prompts for AI-powered content optimization.
  version: 1.0.0
  contact:
    email: support@athenahq.ai
servers:
  - url: https://api.athenahq.ai
    description: Production server
security:
  - apiKey: []
tags:
  - name: Basics
    description: Core API operations for managing websites and prompts
  - name: Metrics
    description: Metrics and analytics endpoints for tracking AI visibility
  - name: Billing
    description: Billing and credits endpoints for managing usage
  - name: Team Management
    description: Endpoints for managing team members and invitations
  - name: Groups
    description: Endpoints for managing groups of websites
  - name: Content
    description: >-
      Endpoints for accessing Content Hub data — tabs, tracked URLs, and per-URL
      prompt breakdowns.
  - name: Pitch Workspace
    description: >-
      Endpoints for accessing pitch workspace reports — org-scoped pitch runs
      with competitors, prompts, attributes, and aggregate metrics.
  - name: Knowledge Base
    description: >-
      Endpoints for reading the brand Knowledge Base — approved brand facts and
      the pillars that organize them.
paths:
  /api/v1/knowledge-base/pillars/{pillar_id}/document:
    get:
      tags:
        - Knowledge Base
      summary: Get Pillar Document
      description: >-
        Fetches a pillar's synthesized markdown document. Returns `document:
        null` when the pillar exists but has no synthesized document yet (this
        is a 200, not a 404). Also available as the MCP tool
        `get_pillar_document`.
      operationId: getPillarDocument
      parameters:
        - name: pillar_id
          in: path
          required: true
          schema:
            type: string
            format: uuid
          description: The pillar whose document to fetch.
        - name: website_id
          in: query
          required: true
          schema:
            type: string
            format: uuid
          description: The website whose Knowledge Base to read.
      responses:
        '200':
          description: Successful response with the pillar's synthesized document
          content:
            application/json:
              schema:
                type: object
                properties:
                  pillar_id:
                    type: string
                    format: uuid
                  name:
                    type: string
                  document:
                    type:
                      - string
                      - 'null'
                    description: >-
                      The synthesized markdown document, or null when none
                      exists yet.
                  generated_at:
                    type:
                      - string
                      - 'null'
                    description: >-
                      ISO 8601 timestamp of the document's last generation, or
                      null.
                required:
                  - pillar_id
                  - name
                  - document
                  - generated_at
        '400':
          description: Bad request - Invalid parameters
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
              examples:
                missing_website_id:
                  value:
                    error: website_id is required
        '401':
          description: Unauthorized - Invalid or missing API key
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '403':
          description: >-
            Forbidden - No access to this website, or the Knowledge Base is not
            enabled for the organization
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
              examples:
                unauthorized_website:
                  value:
                    error: Unauthorized access to this website
                kb_not_enabled:
                  value:
                    error: Knowledge Base is not enabled for this organization
        '404':
          description: Not found - The pillar does not exist on this website
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      security:
        - apiKey: []
components:
  schemas:
    Error:
      type: object
      description: Error response object
      required:
        - error
      properties:
        error:
          type: string
          description: Error message describing what went wrong
          example: Unauthorized
  securitySchemes:
    apiKey:
      type: apiKey
      in: header
      name: x-api-key
      description: >-
        API key for authentication. You can create one
        [here](https://app.athenahq.ai/organization?tab=api).

````